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Q.

A rod of length 20 cm is rotating with angular speed of 100 rps in a magnetic field of strength 0.5 T about its one end. What is the potential difference between two ends of the rod?

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a

2.28 V

b

4.28 V

c

6.28 V

d

2.5 V

answer is C.

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Detailed Solution

e=12Bl2ω=Bl2πνe=0.520×10-22×3.14×100=6.28 V
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